Preheat the oven to 350 degrees.

Grease and flour bundt pan. Set Aside.

In a large bowl, cream butter, oil, salt and sugar on high until light and fluffy.

Add eggs and egg yolks, one at a time, until well combined.

Meanwhile, in a medium bowl, sift together cake flour and baking powder.

Alternate adding flour mixture and sour cream, in three additions, beginning and ending with flour mixture until fully combined.

Mix in vanilla extract and butter extract.

Fold in rainbow jimmies.

Pour cake mixture into bundt pan and bake for 50-60 minutes or until a toothpick inserted into the center of the

cake comes out clean.

Allow cakes to cool in pan for 10 minutes then turn out onto cooling rack and cool completely.